It seems like where you live you should have access to quite a few good transmission shops. I would ask around to find out who does the best work and then get a quote from them on a bench job. If the Jegs trans. is quality built (who knows ??) with a torque conv. then its not a bad price.......BUT I read the add and it does'nt say a thing about warranty but then again a lot of places don't warranty "performance parts"
I suggest doing it your self if you have the tools and patience. The spring compressor is a life saver. I had to rig up some bushing drivers but all in all it turned out really well. I bought a complete kit from Oregan Performance Transmission of e bay and it was a very complete and well packaged kit. I also bought the TH 350 book by Ron Sessions for a guide.